物理化学学报 >> 1995, Vol. 11 >> Issue (01): 20-25.doi: 10.3866/PKU.WHXB19950105

研究论文 上一篇    下一篇

掺杂对Pd/Al2O3催化剂物相结构及表面氧性质的影响

周仁贤, 周烈华, 朱波, 郑小明, 吕光烈   

  1. 杭州大学化学系,杭州 310028|杭州大学中心实验室
  • 收稿日期:1993-10-11 修回日期:1994-01-18 发布日期:1995-01-15
  • 通讯作者: 周仁贤

Effect of ZrO2 on Support Structure and Surface Oxygen Property of Pd/Al2O3

Zhou Ren-Xian, Zhou Lie-Hua, Zhu Bo, Zheng Xiao-Ming, Lv Guang-Lie   

  1. Department of Chemistry,Hangzhou University,Hangzhou 310028|Centry Laboratory of Hangzhou University
  • Received:1993-10-11 Revised:1994-01-18 Published:1995-01-15
  • Contact: Zhou Ren-Xian

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摘要：

采用XRD、DTA、TPD－MS及流动反应法等手段，研究了掺杂超细ZrO2对Pd／Al2O3催化剂物相结构、表面氧性能及催化活性的影响.结果表明，掺杂超细ZrO2，对催化剂Pd／Al2O3的载体物相变化（α－Al2O3的生成）有明显的抑制作用，很高了催化剂的贮氧能力及表面吸附氧的活性，从而提高了催化剂的耐热稳定性、氧化能力以及对贫氧气氛的适应能力．

关键词: 催化剂, 氧化物, 吸附-脱附, 钯

Abstract:

Effects of adding super fine powder ZrO2 on the structure of the support, surface oxygen property and oxidizative activity of Pd/Al2O3 catalyst were investigated by XRD, DTA, TPD-MS and flowing reaction method. It was shown that ZrO2 would prevent the phase transformation (α-Al2O3) of Al2O3 effectively, and promote the ability of storing oxygen and activity of surface adsorption oxygen of the catalyst. Thus, it increased thermal stability, oxidative ability and adaptive ability of catalyst under a lean O2 condition.

Key words: Catalyst, Oxidation, Adsorption-desorption, Pallaium